问题
What is the maximum value of QSlider, in the datasheet, it is just mentioned as int.
I tried with "1000000". but the Slider starts bugging.
QSlider.setMaximum(1000000);
Image with the bug, the blue color and the cursor don't move well at same speed, if the number is at max : 999999999, the cursor don't move at all.
when I put : max at : 650000 that works very well. That is perhaps an OS problem, I am using IOS..
By the way, here is an update of code, works fine with 100000 x 2 possible values:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
MAXVAL = 650000
class RangeSliderClass(QtWidgets.QWidget):
def __init__(self):
super().__init__()
self.minTime = 0
self.maxTime = 0
self.minRangeTime = 0
self.maxRangeTime = 0
self.middleTime = self.getMiddleTime()
self.halfTimeInterval = self.middleTime - self.minTime
self.sliderMin = MAXVAL
self.sliderMax = MAXVAL
self.setupUi(self)
def setupUi(self, RangeSlider):
RangeSlider.setObjectName("RangeSlider")
RangeSlider.resize(631, 65)
RangeSlider.setMaximumSize(QtCore.QSize(16777215, 65))
self.RangeBarVLayout = QtWidgets.QVBoxLayout(RangeSlider)
self.RangeBarVLayout.setContentsMargins(5, 0, 5, 0)
self.RangeBarVLayout.setSpacing(0)
self.RangeBarVLayout.setObjectName("RangeBarVLayout")
self.datesFrame = QtWidgets.QFrame(RangeSlider)
self.datesFrame.setMaximumSize(QtCore.QSize(16777215, 28))
self.datesFrame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.datesFrame.setFrameShadow(QtWidgets.QFrame.Raised)
self.datesFrame.setObjectName("datesFrame")
self.datesHLayout = QtWidgets.QHBoxLayout(self.datesFrame)
self.datesHLayout.setContentsMargins(5, 2, 5, 2)
self.datesHLayout.setObjectName("datesHLayout")
## startTime Calendar Widget
self.startTime = QtWidgets.QDateTimeEdit(self.datesFrame)
self.startTime.setMinimumSize(QtCore.QSize(183, 0))
self.startTime.setMaximumSize(QtCore.QSize(185, 24))
self.startTime.setDate(QtCore.QDate.currentDate().addDays(-1))
self.startTime.setMaximumDateTime(QtCore.QDateTime(QtCore.QDate(2999, 12, 31), QtCore.QTime(23, 59, 59)))
self.startTime.setMaximumDate(QtCore.QDate(2999, 12, 31))
self.startTime.setMinimumDate(QtCore.QDate(2000, 1, 1))
self.startTime.setCalendarPopup(True)
self.startTime.setObjectName("startTime")
self.startTime.dateChanged.connect(self.startDateChangeHandler)
self.datesHLayout.addWidget(self.startTime)
spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
self.datesHLayout.addItem(spacerItem)
## entTime Calendar Widget
self.endTime = QtWidgets.QDateTimeEdit(self.datesFrame)
self.endTime.setMinimumSize(QtCore.QSize(183, 0))
self.endTime.setMaximumSize(QtCore.QSize(185, 24))
self.endTime.setDate(QtCore.QDate.currentDate())
self.endTime.setMaximumDate(QtCore.QDate(2999, 12, 31))
self.endTime.setMinimumDate(QtCore.QDate(2000, 1, 1))
self.endTime.setCalendarPopup(True)
self.endTime.setObjectName("endTime")
self.endTime.dateChanged.connect(self.endDateChangeHandler)
self.datesHLayout.addWidget(self.endTime)
## Init Time
self.minTime = self.startTime.dateTime().toTime_t()
self.maxTime = self.endTime.dateTime().toTime_t()
self.minRangeTime = self.minTime
self.maxRangeTime = self.maxTime
self.middleTime = self.getMiddleTime()
self.halfTimeInterval = self.middleTime - self.minTime
self.RangeBarVLayout.addWidget(self.datesFrame)
self.slidersFrame = QtWidgets.QFrame(RangeSlider)
self.slidersFrame.setMaximumSize(QtCore.QSize(16777215, 25))
self.slidersFrame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.slidersFrame.setFrameShadow(QtWidgets.QFrame.Raised)
self.slidersFrame.setObjectName("slidersFrame")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.slidersFrame)
self.horizontalLayout.setSizeConstraint(QtWidgets.QLayout.SetMinimumSize)
self.horizontalLayout.setContentsMargins(5, 2, 5, 2)
self.horizontalLayout.setSpacing(0)
self.horizontalLayout.setObjectName("horizontalLayout")
## Start Slider Widget
self.startSlider = QtWidgets.QSlider(self.slidersFrame)
self.startSlider.setMaximum(self.sliderMin)
self.startSlider.setMinimumSize(QtCore.QSize(100, 5))
self.startSlider.setMaximumSize(QtCore.QSize(16777215, 10))
font = QtGui.QFont()
font.setKerning(True)
self.startSlider.setFont(font)
self.startSlider.setAcceptDrops(False)
self.startSlider.setAutoFillBackground(False)
self.startSlider.setOrientation(QtCore.Qt.Horizontal)
self.startSlider.setInvertedAppearance(True)
self.startSlider.setObjectName("startSlider")
self.startSlider.setValue(MAXVAL)
self.startSlider.sliderReleased.connect(self.startSliderHandler)
self.horizontalLayout.addWidget(self.startSlider)
## End Slider Widget
self.endSlider = QtWidgets.QSlider(self.slidersFrame)
self.endSlider.setMaximum(MAXVAL)
self.endSlider.setMinimumSize(QtCore.QSize(100, 5))
self.endSlider.setMaximumSize(QtCore.QSize(16777215, 10))
self.endSlider.setTracking(True)
self.endSlider.setOrientation(QtCore.Qt.Horizontal)
self.endSlider.setObjectName("endSlider")
self.endSlider.setValue(self.sliderMax)
self.endSlider.sliderReleased.connect(self.endSliderHandler)
self.horizontalLayout.addWidget(self.endSlider)
self.RangeBarVLayout.addWidget(self.slidersFrame)
self.retranslateUi(RangeSlider)
QtCore.QMetaObject.connectSlotsByName(RangeSlider)
self.show()
def getMiddleTime(self, maxTime = None, minTime = None):
if minTime == None :
minTime = self.minRangeTime
if maxTime == None :
maxTime = self.maxRangeTime
return (minTime + maxTime)/2
def getRangeTime(self):
return self.minRangeTime, self.maxRangeTime
def startSliderHandler(self):
self.sliderMin = self.startSlider.value()
self.minRangeTime = int(self.middleTime - self.halfTimeInterval * self.sliderMin / MAXVAL)
#print("\n\nNew Min Time Range : ", self.minRangeTime, " Min : ", self.minTime, "Minddle : ", self.middleTime)
def endSliderHandler(self):
self.sliderMax = self.endSlider.value()
self.maxRangeTime = int(self.middleTime + self.halfTimeInterval * self.sliderMax / MAXVAL)
print("\n\nNew Min Time Range : ", self.maxRangeTime, " Max : ", self.maxTime, "Minddle : ", self.middleTime)
def startDateChangeHandler(self):
self.minTime = self.startTime.dateTime().toTime_t()
#print("MinTime range : ", self.minTime)
def endDateChangeHandler(self):
self.maxTime = self.endTime.dateTime().toTime_t()
#print("MaxTime range : ", self.maxTime)
def retranslateUi(self, RangeSlider):
_translate = QtCore.QCoreApplication.translate
RangeSlider.setWindowTitle(_translate("RangeSlider", "Time interval"))
self.startTime.setDisplayFormat(_translate("RangeSlider", "dd/MM/yyyy HH:mm:ss .zz"))
self.endTime.setDisplayFormat(_translate("RangeSlider", "dd/MM/yyyy HH:mm:ss .zz"))
app = QtWidgets.QApplication(sys.argv)
awindow = RangeSliderClass()
sys.exit(app.exec_())
回答1:
You can set QSlider maximum value with 9 digits.
QSlider.setMaximum(999999999);
回答2:
The answer of @aghilpro is not incorrect on Qt Designer the limit is 999999999 (9 digits)
But QSlider inherits QAbstractSlider and on definition of properties we have:
...
Q_PROPERTY(int minimum READ minimum WRITE setMinimum)
Q_PROPERTY(int maximum READ maximum WRITE setMaximum)
...
Then the max int value is 2,147,483,647 (10 digits) then 9999999999 overflow that value;
来源：https://stackoverflow.com/questions/46218702/maximum-value-of-qslider